You don't say whether they are 92 or 94mm, but I don't suppose that makes any difference to the answers

92mm

Quote:

Originally Posted by Pict

They are different sizes. Larger to the INLET - beware of 'front' or 'rear' - think INLET / EXHAUST.

Hmmm...the mic up the same

Quote:

Originally Posted by Pict

It DOES matter but I think N on top is correct, if no-one else jumps in I will check later.

Quote:

Originally Posted by Pict

The clearances, and where on the bore to measure them comes with the piston. You can have Nikasil stripped / replated / honed or cylinder bored and re plated. Google 'Langcourt'

They are "drop-in" pistons, and my piston to wall clearance is listed above.

No where on the spec sheet of the piston are the suggested ring gaps. There are measurements for the actual machine work on the piston, but nothing about ring gap. Piston to wall clearance is listed at .0020, mine are measuring .0002-.0003 larger, which I can't imagine would be a problem.

I'm looking for people who have installed these things to let me know where I'm at. I've obviously already checked the piston/wall clearance, know what a dial bore gauge is, etc.

__________________
Moving back to FLORIDA! Lots in the garage, so help me clear out some of my:Random Ducati Parts

Your clearances are good. Ring gaps are fine and the "N" goes up. The piston only goes in one way. The diameter of the valve pockets in the top of the piston are different! The smaller dia pocket goes to the exhaust valve pocket. I recommend ball honing the bores, it wont change the diameter much and will have a better surface. I took mine to Ducati Milwaukee and they brushed it while I waited. I had them do it, just so I wouldn't have to buy a hone that size.

I had the same questions with my JE piston kit, so I called JE and they said run it! I have several thousand miles on it now and I love it.

And for me being a Pilot and A&P, thanks for your help as a controller.

Your clearances are good. Ring gaps are fine and the "N" goes up. The piston only goes in one way. The diameter of the valve pockets in the top of the piston are different! The smaller dia pocket goes to the exhaust valve pocket. I recommend ball honing the bores, it wont change the diameter much and will have a better surface. I took mine to Ducati Milwaukee and they brushed it while I waited. I had them do it, just so I wouldn't have to buy a hone that size.

I had the same questions with my JE piston kit, so I called JE and they said run it! I have several thousand miles on it now and I love it.

And for me being a Pilot and A&P, thanks for your help as a controller.

Cheerio and I hope this helps.

Bill

Thanks Bill. Nice work on those exhaust retainers and even more so on the dual plug heads!!!

__________________
Moving back to FLORIDA! Lots in the garage, so help me clear out some of my:Random Ducati Parts

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